Sealed padlock



y A. c. JACKSON SEALED PADLO C K Patented May 17,1927.

UNITED STATES PATIENT OFFICE.

ARTHUR C. JACKSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE YALE &

TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT, A CORPORA- TIONOF CONNECTICUT.

. SEALED rAnLooK.

Application filed November 17, 1925. Serial No.-69,649.

One object of my invention is to provide a padlock with a seal whichwill engagethe bolt and other interior mechanisms of'the look.

A further object of my invention is to seal the key opening of the lockas well as the interior mechanism of the look. I lay no claim to the keyhole sealing construction alone.

In the accompanying drawing:

Fig. 1 is a perspective View of a padlock illustrating my invention;

V Fig. 2 is a sectional view with one of the side plates removed,showing the sealing band engaging the bolt and the key in position; 2

Fig. 3 is a view similar to Fig. 2, showing the bolt withdrawn and theshackle raised; and

Fig. 4 is a sectional view illustrating a modification of the invention.

The mechanism of the lock may be modi fied without departing from themain 63.". tures of the invention.

The casing 1 of the padlock, in the present instance, consists of aback-plate 3 made integral with the shell 4, and a front plate 2 securedto the shell by riveting.

The shackle 5 is pivoted at 6 to the casing and has a perforated nose 7into which is projected the bolt 8, having a stump 9 which extends intoa slot 10 in the tumbler 11. This tumbler 11 is slotted as shown for thereception of the pin 12, and has a curved extension 13 which encirclesthe key-way.

When the padlock is locked, the key 14 can be inserted in the keyopening and mounted on the key-post 15. The key is free to turn andengage the bolt, withdrawing itand at the same time raising the tumbler11 to such a position as to bring the extension 13 into the path of thekey as shown in Fig. 3, so that it is impossible'to withdraw the keywhen the lock is open.

" This lock is particularly adapted for use as a railway switch lock.

The particular lock shown and as above described is fully set forth andclaimed in the patent granted to Frank Soley on the 26th day of April,1910, No. 956,213.

At the front of the lock is a plate 16, having a key opening 17 in linewith the key opening of the lock. The plate has a slot 18 wider than thekey openingfor the reception of the metallic sealing band 19, so thatwhen the band is in position, the key opening in the lock is closed.

In order to increase the security of the lock, the front and back-platesof the lock are slotted at 20. The bolt 8 is notched at 21 and thetumbler 11 is preferably notched at 22.

The notches 21 and 22 are in alignment with the slots 20 when theshackle is closed and locked, so that the metallic sealing band 19 canbe passed through the slots in the casing as shown in Fig. 1, andthrough the slot 18 in the plate 16. The two ends of the band 19 arebrought together under the lock and a seal 23 applied as shown in Fig.1.

By this means, the key opening is not only sealed, but the sealing bandprevents the movement'of the bolt and other mechanism of the lock,should an endeavor bevmade to throw the bolt by striking or otherwisemanipulating the casing.

As soon as the seal is broken, the band is removed, releasing the boltand allowing a clear passage for the key, which, when turned, withdrawsthe bolt and releasesthe shackle.

In some instances the sealing band may be applied as in Fig. 1. The band19 is passed through the space enclosed by the shackle, after which theseal is applied. By this means, the bolt and tumbler are sealed.

I claim:

1. The combination in a padlock, of a casing having slotted front andback plates; a slotted locking-bolt and a slotted tumbler; the slots insaid locking-bolt and tumbler being in line with the slots in the casingwhen the bolt is in the locking position: and a sealing band extendingthrough the casing slots and engaging the bolt and the tumbler. e

2. The combination in a padlock, of a casing having slotted'front andback plates; a notched bolt, the notch in the bolt aligning with theslots in the casing when the bolt is in locked position; a slotted plateat the key-hole of the lock; and a sealing band extending through theslot in the casing and engaging the bolt and through the slot in theplate and covering the key-hole of the lock.

ARTHUR O. JACKSON.

